MESON Chess Problem Database

Problem Display
PID: 227113 (3r4/1Nq5/n2p2R1/1P1kp3/3N4/B2PP1K1/b1P5/4nQ2 w - - 0 1)

Wielgos, Oskar

Schweizerische Schachzeitung, 1985

3r4/1Nq5/n2p2R1/1P1kp3/3N4/B2PP1K1/b1P5/4nQ2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Qf7#
    • 1...Qb6
      • 2.Qf7#
    • 1...Qb8
      • 2.Qf7#
    • 1...Qxc2
      • 2.Qf7#
    • 1...Qc3
      • 2.Qf7#
    • 1...Qc4
      • 2.Qf7#
    • 1...Qc5
      • 2.Qf7#
    • 1...Qc6
      • 2.Qf7#
    • 1...Qf7
      • 2.Qxf7#
    • 1...exd4
      • 2.Qf5#
    • 1...e4
      • 2.Rg5#
      • 2.Qf5#
  • Tries
    • 1.Se2?
      • threat
        • 2.e4#
      • 1...e4
        • 2.Qf5#
      • 1...Qc4
        • 2.Qf7#
      • 1...Sc5
        • 2.Sc3#
      • 1...Sxd3!
    • 1.Sb3?
      • threat
        • 2.e4#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...e4
        • 2.Qf5#
      • 1...Qc4
        • 2.Qf7#
      • 1...Sc5
        • 2.c4#
      • 1...Bxb3!
    • 1.Se6?
      • threat
        • 2.e4#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...e4
        • 2.Qf5#
      • 1...Sc5
        • 2.Sxc7#
      • 1...Qc4!
    • 1.Qf3+?
      • 1...e4
        • 2.Rg5#
        • 2.Qxe4#
        • 2.Qh5#
        • 2.Qf5#
      • 1...Sxf3!
    • 1.c4+?
      • 1...Qxc4
        • 2.Qf7#
      • 1...Bxc4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.e4#
      • 1...Qxc6
        • 2.Qf7#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sc5
        • 2.Sb4#
      • 1...e4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(g);N_GUARD::QAB(A)
    • Q(g);N_GUARD,XP(B)::QAB(A)
    • Q(g);N_GUARD::QAB(A),XQ(g)
    • P(d);OGATEB,XS(G)::QAR2(A)
  • Tries
    • Try
      • S(G);
      • Threat
        • P(E)
      • Vars
        • P(d);OGATEB::QAR2(A)
        • Q(g);N_GUARD::QAB(A)
        • S(e);S_CUTQ(g)::S(G)
      • Refutation
        • S(a);XP(D)
    • Try
      • S(G);
      • Threat
        • P(E)
      • Vars
        • S(a);OGATE,XP(D)::QAR2(A),XS(a)
        • P(d);OGATEB::QAR2(A)
        • Q(g);N_GUARD::QAB(A)
        • S(e);S_CUTQ(g)::P(B)
      • Refutation
        • B(b);XS(G)
    • Try
      • S(G);
      • Threat
        • P(E)
      • Vars
        • S(a);OGATE,XP(D)::QAR2(A),XS(a)
        • P(d);OGATEB::QAR2(A)
        • S(e);N_GUARD::S(G),XQ(g)
      • Refutation
        • Q(g);
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
    • Try
      • P(B);CHECK
      • Vars
        • Q(g);XP(B)::QAB(A)
      • Refutation
        • B(b);XP(B)
  • Actual
    • S(G);
    • Threat
      • P(E)
    • Vars
      • Q(g);N_GUARD,XS(G)::QAB(A)
      • S(a);OGATE,XP(D)::QAR2(A),XS(a)
      • S(e);N_GUARD::S(G)
      • P(d);OGATEB::QAR2(A)
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